It's a very cool box,fits the challenge, but a different angle may have made it more interesting. Shallower DOF would keep our attention on the box instead of trying to see what else is in the background. :)
Think the size will count against you though. Not sure what camera you're using, but some have their resolutions set at 180, and when resizing to 640 make the pic actually a lot smaller. Try setting the resolution to 72, and then resize to 640. Other than that, not bad.